+2.5V to +5.5V RS-232 Transceivers

in UCSP

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

+25°C, unless otherwise noted.) (Note 3)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

RECEIVER INPUTS

Input Voltage Range

-25

+25

V

0.6

1.2

Input Threshold Low

0.8

1.7

V

1.3

2.4

Input Threshold High

1.8

2.4

V

Input Hysteresis

0.5

V

Input Resistance

35

7

k

Ω

AUTOSHUTDOWN

Positive threshold

2.7

Receiver Input Threshold to

INVALID Output High

Figure 3a

Negative threshold

-2.7

V

Receiver Input Threshold to

INVALID Output Low

-0.3

0.3

V

Receiver Positive or Negative

Threshold to

INVALID High

1

µs

Receiver Positive or Negative

Threshold to

INVALID Low

30

µs

Receiver Edge to Transmitters

Enabled

100

µs

TRANSMITTER OUTPUTS

T_OUT = ±5.0V to ±3.7V

2.85

3.1

V

T_OUT = ±3.7V to ±5.0V

3.3

3.7

V

400

mV

±5

±5.4

Output Voltage Swing

All transmitter

outputs loaded with

3k

Ω to ground.

+2.9V

±3.7

V

Output Resistance

300

10M

Ω

Output Short-Circuit Current

±60

mA

Output Leakage Current

T_OUT = ±12V, transmitters disabled

±25

µA

INVALID OUTPUT

Output Voltage Low

0.4

V

Output Voltage High

V